Exchange · noncustodial-swap

SideSwap

What it is. A non-custodial, KYC-free swap platform native to the Liquid Network — settlement infrastructure for L-BTC, L-USDt, and tokenized assets, with public order books (maker limit orders, taker market orders).

What it bridges. L-BTC ↔ L-USDt and direct asset-to-asset swaps on Liquid (no intermediate conversion).

Agent access. Documented API (sideswap.io/docs) over the Liquid order book — JSON-RPC 2.0 over a WebSocket (wss://api.sideswap.io/json-rpc-ws), with a matching testnet endpoint for dry runs. Market data and the asset registry answer without an account or an API key; self-custody throughout. Note the published changelog has not moved since February 2025, so treat the docs as stable rather than actively maintained.

How an agent uses it. An agent holding Liquid assets (L-BTC, L-USDt) swaps between them via the order book API. Best fit for an agent already operating on Liquid for the gas-free USDt properties.

Dependencies. A self-custody wallet holding Liquid assets (L-BTC, L-USDt) and the order-book API; no account or KYC, but you must already be on Liquid (bridge in first). No fiat; Liquid-network-scoped.

Gotchas. Liquid-network-scoped and not Lightning — an agent settling over Lightning needs a different venue. It is not true, as this card said until 2026-08-20, that L1 BTC is out of reach and you must bridge to Liquid first: SideSwap’s own API is that bridge, exposing peg-in (BTC → L-BTC) and peg-out (L-BTC → BTC) as documented peg calls, so the on-chain leg is programmatic rather than someone else’s problem. Pegging is still an on-chain operation with its own confirmation wait and minimum amounts. L-USDt carries Tether’s freeze surface, and EURx carries its issuer’s. No fiat. Order-book liquidity/spread risk.

Links. sideswap.io · API docs.